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<div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br />
</div>
<p><a href="absdiff_8cl_source.xhtml">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:abd1c22f3b8c5d2d0a1de36f45c38b88f"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="absdiff_8cl.xhtml#abd1c22f3b8c5d2d0a1de36f45c38b88f">absdiff</a> (__global uchar *in1_ptr, uint in1_stride_x, uint in1_step_x, uint in1_stride_y, uint in1_step_y, uint in1_offset_first_element_in_bytes, __global uchar *in2_ptr, uint in2_stride_x, uint in2_step_x, uint in2_stride_y, uint in2_step_y, uint in2_offset_first_element_in_bytes, __global uchar *out_ptr, uint out_stride_x, uint out_step_x, uint out_stride_y, uint out_step_y, uint out_offset_first_element_in_bytes)</td></tr>
<tr class="memdesc:abd1c22f3b8c5d2d0a1de36f45c38b88f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculate the absolute difference of two input images.  <a href="#abd1c22f3b8c5d2d0a1de36f45c38b88f">More...</a><br /></td></tr>
<tr class="separator:abd1c22f3b8c5d2d0a1de36f45c38b88f"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="abd1c22f3b8c5d2d0a1de36f45c38b88f"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">__kernel void absdiff </td>
          <td>(</td>
          <td class="paramtype">__global uchar *&#160;</td>
          <td class="paramname"><em>in1_ptr</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in1_stride_x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in1_step_x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in1_stride_y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in1_step_y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in1_offset_first_element_in_bytes</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">__global uchar *&#160;</td>
          <td class="paramname"><em>in2_ptr</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in2_stride_x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in2_step_x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in2_stride_y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in2_step_y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>in2_offset_first_element_in_bytes</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">__global uchar *&#160;</td>
          <td class="paramname"><em>out_ptr</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>out_stride_x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>out_step_x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>out_stride_y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>out_step_y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint&#160;</td>
          <td class="paramname"><em>out_offset_first_element_in_bytes</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Calculate the absolute difference of two input images. </p>
<dl class="section attention"><dt>Attention</dt><dd>The input and output data types need to be passed at compile time using -DDATA_TYPE_IN1, -DDATA_TYPE_IN2 and -DDATA_TYPE_OUT:<br />
e.g. -DDATA_TYPE_IN1=uchar -DDATA_TYPE_IN2=uchar -DDATA_TYPE_OUT=short</dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">in1_ptr</td><td>Pointer to the first source image. Supported data types: U8, S16 </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in1_stride_x</td><td>Stride of the first source image in X dimension (in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in1_step_x</td><td>src_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in1_stride_y</td><td>Stride of the first source image in Y dimension (in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in1_step_y</td><td>src_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in1_offset_first_element_in_bytes</td><td>The offset of the first element in the first source image </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in2_ptr</td><td>Pointer to the second source image. Supported data types: U8, S16 </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in2_stride_x</td><td>Stride of the second source image in X dimension (in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in2_step_x</td><td>src_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in2_stride_y</td><td>Stride of the second source image in Y dimension (in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in2_step_y</td><td>src_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">in2_offset_first_element_in_bytes</td><td>The offset of the first element in the second source image </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8, S16 </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">out_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">out_step_x</td><td>dst_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">out_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">out_step_y</td><td>dst_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">out_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
  </table>
  </dd>
</dl>

<p>Definition at line <a class="el" href="absdiff_8cl_source.xhtml#l00050">50</a> of file <a class="el" href="absdiff_8cl_source.xhtml">absdiff.cl</a>.</p>

<p>References <a class="el" href="fixed__point_8h_source.xhtml#l00098">CONVERT</a>, <a class="el" href="direct__convolution1x1_8cl_source.xhtml#l00040">CONVERT_SAT</a>, <a class="el" href="helpers_8h_source.xhtml#l00104">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="convolution3x3_8cl_source.xhtml#l00031">DATA_TYPE_OUT</a>, <a class="el" href="helpers_8h_source.xhtml#l00144">Image::ptr</a>, and <a class="el" href="fixed__point_8h_source.xhtml#l00093">VEC_DATA_TYPE</a>.</p>
<div class="fragment"><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;{</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> in1 = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(in1);</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> in2 = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(in2);</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> out = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a>, 16)</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    in_a = <a class="code" href="fixed__point_8h.xhtml#aa8d95ba04fc73845abc6045952cae5be">CONVERT</a>(vload16(0, (__global DATA_TYPE_IN1 *)in1.ptr), <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a>, 16));</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE_OUT, 16)</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    in_b = <a class="code" href="fixed__point_8h.xhtml#aa8d95ba04fc73845abc6045952cae5be">CONVERT</a>(vload16(0, (__global DATA_TYPE_IN2 *)in2.ptr), <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE_OUT, 16));</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    vstore16(<a class="code" href="direct__convolution1x1_8cl.xhtml#a1f15728672380ade7a238f5e783d54d2">CONVERT_SAT</a>(abs_diff(in_a, in_b), <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE_OUT, 16)), 0, (__global DATA_TYPE_OUT *)out.ptr);</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;}</div><div class="ttc" id="fixed__point_8h_xhtml_aa8d95ba04fc73845abc6045952cae5be"><div class="ttname"><a href="fixed__point_8h.xhtml#aa8d95ba04fc73845abc6045952cae5be">CONVERT</a></div><div class="ttdeci">#define CONVERT(x, type)</div><div class="ttdef"><b>Definition:</b> <a href="fixed__point_8h_source.xhtml#l00098">fixed_point.h:98</a></div></div>
<div class="ttc" id="direct__convolution1x1_8cl_xhtml_a1f15728672380ade7a238f5e783d54d2"><div class="ttname"><a href="direct__convolution1x1_8cl.xhtml#a1f15728672380ade7a238f5e783d54d2">CONVERT_SAT</a></div><div class="ttdeci">#define CONVERT_SAT(a, b)</div><div class="ttdef"><b>Definition:</b> <a href="direct__convolution1x1_8cl_source.xhtml#l00040">direct_convolution1x1.cl:40</a></div></div>
<div class="ttc" id="helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00104">helpers.h:104</a></div></div>
<div class="ttc" id="struct_image_xhtml"><div class="ttname"><a href="struct_image.xhtml">Image</a></div><div class="ttdoc">Structure to hold Image information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00142">helpers.h:142</a></div></div>
<div class="ttc" id="fixed__point_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="fixed__point_8h_source.xhtml#l00093">fixed_point.h:93</a></div></div>
<div class="ttc" id="convolution3x3_8cl_xhtml_ac06f3e24d3fffd3c465d8b2a6e7c985e"><div class="ttname"><a href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a></div><div class="ttdeci">#define DATA_TYPE_OUT</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00031">convolution3x3.cl:31</a></div></div>
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